EP0105541A2 - Umrichter von Gleich- in Wechselspannung mit galvanisch getrenntem Ein- und Ausgang - Google Patents

Umrichter von Gleich- in Wechselspannung mit galvanisch getrenntem Ein- und Ausgang Download PDF

Info

Publication number
EP0105541A2
EP0105541A2 EP83201258A EP83201258A EP0105541A2 EP 0105541 A2 EP0105541 A2 EP 0105541A2 EP 83201258 A EP83201258 A EP 83201258A EP 83201258 A EP83201258 A EP 83201258A EP 0105541 A2 EP0105541 A2 EP 0105541A2
Authority
EP
European Patent Office
Prior art keywords
circuit
switching transistor
converter
transistor
output
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP83201258A
Other languages
English (en)
French (fr)
Other versions
EP0105541A3 (en
EP0105541B1 (de
Inventor
Gerben Simon Hoeksma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nederlandsche Apparatenfabriek NEDAP NV
Original Assignee
Nederlandsche Apparatenfabriek NEDAP NV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nederlandsche Apparatenfabriek NEDAP NV filed Critical Nederlandsche Apparatenfabriek NEDAP NV
Priority to AT83201258T priority Critical patent/ATE41083T1/de
Publication of EP0105541A2 publication Critical patent/EP0105541A2/de
Publication of EP0105541A3 publication Critical patent/EP0105541A3/en
Application granted granted Critical
Publication of EP0105541B1 publication Critical patent/EP0105541B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop

Definitions

  • This invention relates to a DC-to-AC voltage converter for the supply of power to at least one load, and having galvanically separated input and output circuits.
  • DC-to-AC voltage converters have many uses, such as the supply of power to gas discharge lamps or, after rectifying and smoothing the AC voltage, supplying power to electronic circuits, motors, relays, magnetic valves, magnetic clutches, etc.
  • the converter comprises at least one switching transistor, a resonance capacitor, a converter transformer, and control means for the switching transistor.
  • a relatively high DC input voltage e.g. of between 50 V and 1000 V
  • This object is achieved in the circuit according to the present invention by using charge storage in the switching transistor proper.
  • the winding included in the input circuit of the converter is not strongly coupled with the windings in the output circuit(s), and at least one resonance capacitor is included in the input circuit.
  • the converter transformer, the resonance capacitor and the control means for the switching transistor are so dimensioned and designed that the voltage generated across the collector and emitter of the switching transistor, after the transistor has been turned off, falls back to a very low value before the switching transistor is again rendered conductive, also in the case of short-circuiting of the output circuit(s).
  • the same resonance capacitor provides for a slowly increasing collector-emitter voltage. In this way, both when it becomes conductive and when it becomes non-conductive, the switching transistor is loaded very favourably, with a very small chance of secondary breakdown, and the converter is capable of operating very reliably without the use of power dissipating means.
  • the primary circuit comprises a series circuit of a primary winding 1 of a converter transformer 2 and a switching transistor 3, which series circuit is connected between a positive input terminal 20 . and a negative input terminal 21. Connected in parallel to transistor 3 and/or in parallel to winding 1 is at least one resonance capacitor 4.
  • transistor 3 receives base driving power via a starting resistor 6, a primary auxiliary winding 7, a diode 8 and a base resistor 9.
  • a resistor 10 connected between the end of resistor 9 remote from the base and the emitter of transistor 3 is dimensioned so that the circuit is unable to start when the voltage applied to terminals 20 and 21 is insufficient, as the base-emitter junction of transistor 3 is then insufficiently biased.
  • the starting resistor 6 is relatively high-ohmic, and accordingly dissipates little power.
  • transistor 3 When the transistor becomes conductive, a voltage is generated across the auxiliary winding 7, which is strongly coupled with the primary winding 1 of transformer 2. As a result transistor 3 receives ⁇ sufficient driving power via a network 11, designed as a source of current and smoothing device, auxiliary winding 7, diode 8, and base resistor 9 to be driven into saturation.
  • a voltage limiter 12 serves to limit the base current of transistor 3, and hence the collector current of transistor 3, in particular during starting.
  • the auxiliary winding 7 of transformer 2 also supplies power to a time-delay and turn-off network 13, which turns off transistor 3 at a variable instant after the transistor has become conductive. This turning off is effected by taking over the current originally flowing through base resistor 9, and finally by withdrawing a negative base current from transistor 3 via a terminal 40.
  • the time lapsing between the instant the switching transistor 3 becomes conductive and the decrease and reversal of the base driving current of transistor 3 can be influenced by an analog feedback signal which is transmitted via a feedback member 14 featuring galvanic separation, or by another adjusting member, not shown, connected to network 13.
  • the feedback member 14 may comprise, for example, an "optocoupler” consisting of a light emitting diode and a phototransistor.
  • the feedback signal referred to comes from a comparator circuit 15 which compares the desired value 22 of a physical magnitude converted into an electrical voltage, such as a voltage, current, light intensity, sound pressure, or combinations thereof, with an actual value 23 converted into an electrical voltage, and on this ground can supply a control signal to the feedback member 14, thereby to stabilize the output magnitude. If the comparator circuit 15 is designed with galvanic separation, its output signal may also be supplied to network 13 either directly or indirectly.
  • the converter can be sufficiently turned down even when in unloaded or lightly-loaded condition, without it being necessary for the base current to be removed too rapidly and reversed, which would involve the risk of secondary breakdown by "current-tailing" of the switching transistor; and without the occurrence of control instabilities which lead to the converter being periodically switched on and off, which also involves the risk of secondary breakdown owing to the repeated loads when the converter is repeatedly re-started.
  • the drive by charge storage which automatically adapts itself to the load condition, increases the converter's reliability, in particular in lightly-loaded condition.
  • An extension of the arrangement, also shown in Fig. 1, comprises a current . measuring resistor 18 and a collector current limiter 19.
  • the collector current limiter 19 comprises a comparator circuit which when a given voltage level across resistor 18, corresponding to a given collector current of switching transistor 3, is exceeded supplies a signal to turn-off network 13, which renders transistor 3 non-conductive, in the manner described before.
  • network 13 automatically turns off the converter, or adjusts it to a low level. In this way, overload of the secondary rectifier(s), if present, and the output load(s) is prevented, and there is also provided a safeguard, against the results of the feedback member 14 becoming out of order.
  • the blocks shown in Fig. 1 are designed as shown in Figs. 2 - 5.
  • Block 11 in Fig. 1 may be designed as shown in Fig. 2. Terminals 24 and 25 correspond to those in Fig. 1.
  • the smoothing function is carried out by a capacitor 33, while resistor 34 limits the currents flowing to and from the smoothing capacitor 33.
  • resistor 34 limits the currents flowing to and from the smoothing capacitor 33.
  • Resistor 32 is considerably lower in ohmic value than resistors 26, 27, 28 and 30.
  • block 13 is designed as shown in Fig. 4.
  • This embodiment also includes the safeguard against overload of the converter and against the feedback loop becoming defective. Its operation is as follows. After transistor 3 has become conductive, terminal 44 becomes positive relative to terminal 41 ' owing to the voltage generated across auxiliary winding 7. Via a diode 46, a capacitor 50 (which immediately after the converter has been turned on is still uncharged) and a resistor 48, a capacitor 56 is charged until a D arlington transistor circuit 58 becomes conductive, and via a resistor 59 causes transistor 3 to become non-conductive. Subsequently the base of transistor 3 is kept negative relative to its emitter via resistor 59 and a resistor 60.
  • Capacitor 56 is discharged, owing to the voltage across auxiliary winding 7 being reversed in polarity,via a diode 55 and a resistor 54, until a voltage value of abart-0.7 V is reached (determined by diode 57), and is re-charged during the next period when transistor 3 is conductive.
  • the phototransistor of an optocoupler which in this example is present in the feedback member 14, becomes conductive, and capacitor 56 is charged via diode 46, resistor 45, the phototransistor of the optocoupler and resistor 47, and this the more rapidly as the phototransistor of the optocoupler is more conductive.
  • a transistor 49 is now rendered conductive by the voltage drop across resistor 45, which in turn is a result of the feedback signal supplied via the optocoupler .
  • Transistor 49 then short-circuits capacitor 50 and transistor 53 remains cut-off.
  • transistor 53 will be rendered conductive and, via resistor 47, capacitor 56 will be very rapidly charged, thereby turning off transistor 3 after a very short conductive period, and so controlling the converter to a minimum level.
  • FIG. 5 A preferred embodiment of the arrangement of block 19 is shown in Fig. 5.
  • the terminals correspond to Fig. 1.
  • transistor 63 is a silicon pnp transistor
  • transistor 63 becomes conductive and via resistor 64 capacitor 56 is charged very rapidly, wherafter transistor 58 renders transistor 3 non-conductive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)
  • Inverter Devices (AREA)
  • Burglar Alarm Systems (AREA)
EP83201258A 1982-09-06 1983-09-01 Umrichter von Gleich- in Wechselspannung mit galvanisch getrenntem Ein- und Ausgang Expired EP0105541B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83201258T ATE41083T1 (de) 1982-09-06 1983-09-01 Umrichter von gleich- in wechselspannung mit galvanisch getrenntem ein- und ausgang.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8203474 1982-09-06
NL8203474 1982-09-06

Publications (3)

Publication Number Publication Date
EP0105541A2 true EP0105541A2 (de) 1984-04-18
EP0105541A3 EP0105541A3 (en) 1986-02-05
EP0105541B1 EP0105541B1 (de) 1989-03-01

Family

ID=19840236

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201258A Expired EP0105541B1 (de) 1982-09-06 1983-09-01 Umrichter von Gleich- in Wechselspannung mit galvanisch getrenntem Ein- und Ausgang

Country Status (6)

Country Link
US (1) US4566060A (de)
EP (1) EP0105541B1 (de)
JP (1) JPS5963985A (de)
AT (1) ATE41083T1 (de)
CA (1) CA1199062A (de)
DE (1) DE3379310D1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587506A (en) * 1983-12-22 1986-05-06 N.V. Nederlandsche Apparatenfabriek Nedap Safety transformer
EP0203444A1 (de) * 1985-05-23 1986-12-03 Siemens Aktiengesellschaft Primärgetaktetes Schaltnetzteil
EP0387961A1 (de) * 1989-03-14 1990-09-19 N.V. Nederlandsche Apparatenfabriek NEDAP Gleichspannungs-Wechselspannungs-Umformer mit galvanisch getrennten Eingangs- und Ausgangsschaltungen
EP0460411A1 (de) * 1990-06-06 1991-12-11 International Business Machines Corporation Einrichtung und Verfahren zur Verbesserung der Steuerung von Schaltnetzteilen
EP0474312A1 (de) * 1990-09-06 1992-03-11 N.V. Nederlandsche Apparatenfabriek NEDAP Gleichstromwandler

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8334372D0 (en) * 1983-12-23 1984-02-01 Gen Electric Co Plc Dc-dc converter
US4751403A (en) * 1984-06-15 1988-06-14 Hitachi, Ltd. Transistor driving circuit and circuit controlling method
US4680687A (en) * 1984-08-07 1987-07-14 Siemens Aktiengesellschaft Switch-mode power supply having a free-running forward converter
IT1218854B (it) * 1984-11-07 1990-04-24 Ates Componenti Elettron Circuito di comando, integrato monoliticamente, per la commutazione di transistori
US4692688A (en) * 1985-12-09 1987-09-08 National Semiconductor Corporation Zero standby current switch method and apparatus
JPS62242413A (ja) * 1986-04-15 1987-10-23 Mitsubishi Electric Corp トランジスタのベ−ス駆動回路
US4860185A (en) * 1987-08-21 1989-08-22 Electronic Research Group, Inc. Integrated uninterruptible power supply for personal computers
US5537029A (en) 1992-02-21 1996-07-16 Abb Power T&D Company Inc. Method and apparatus for electronic meter testing
US5457621A (en) * 1992-02-21 1995-10-10 Abb Power T&D Company Inc. Switching power supply having voltage blocking clamp
AU736045B2 (en) 1996-10-22 2001-07-26 Abb Inc. Energy meter with power quality monitoring and diagnostic systems
DE19719584A1 (de) * 1997-05-09 1998-11-12 Werner Nophut Gmbh Dipl Ing Schaltungsanordnung für einen Gleichspannungswandler
WO2000046924A1 (en) * 1999-02-05 2000-08-10 Koninklijke Philips Electronics N.V. Driving a switching transistor
US7315162B2 (en) * 2004-03-18 2008-01-01 Elster Electricity, Llc Reducing power consumption of electrical meters
US7227350B2 (en) * 2004-03-18 2007-06-05 Elster Electricity, Llc Bias technique for electric utility meter
US7355867B2 (en) * 2004-08-17 2008-04-08 Elster Electricity, Llc Power supply for an electric meter having a high-voltage regulator that limits the voltage applied to certain components below the normal operating input voltage

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1485709A (en) * 1974-11-29 1977-09-14 Denki Onkyo Co Ltd High voltage supply system using piezoelectric transforme
EP0043761A1 (de) * 1980-07-04 1982-01-13 Société S E R E L Schalttransistorsteuerschaltung in einem statischen Wandler und Wandler mit dieser Schaltung
DE3219964A1 (de) * 1982-05-27 1984-02-09 ANT Nachrichtentechnik GmbH, 7150 Backnang Schaltregler mit einem pi- und einem d-regler in der regelschleife

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973220A (en) * 1975-06-02 1976-08-03 Ni-Tec, Inc. Oscillator amplitude regulating system
US4058758A (en) * 1976-07-02 1977-11-15 Bell Telephone Laboratories, Incorporated Cooperative primary and secondary current limiting to selectively limit aggregate and individual current outputs of a multi output converter
US4156273A (en) * 1976-10-07 1979-05-22 Sanyo Electric Co., Ltd. Protection of a switching regulator
US4283759A (en) * 1977-08-01 1981-08-11 Toko, Inc. Switching regulator
JPS56150968A (en) * 1980-04-22 1981-11-21 Toshiba Corp Switching circuit of single end high frequency
JPS57113778A (en) * 1980-12-27 1982-07-15 Toshiba Electric Equip Corp Transistor inverter
JPS57133296U (de) * 1981-02-16 1982-08-19
US4464606A (en) * 1981-03-25 1984-08-07 Armstrong World Industries, Inc. Pulse width modulated dimming arrangement for fluorescent lamps
US4410934A (en) * 1981-07-22 1983-10-18 Masco Corporation DC Power supply for an air filter
US4464709A (en) * 1982-04-06 1984-08-07 Tektronix, Inc. Current and voltage protection for a power supply circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1485709A (en) * 1974-11-29 1977-09-14 Denki Onkyo Co Ltd High voltage supply system using piezoelectric transforme
EP0043761A1 (de) * 1980-07-04 1982-01-13 Société S E R E L Schalttransistorsteuerschaltung in einem statischen Wandler und Wandler mit dieser Schaltung
DE3219964A1 (de) * 1982-05-27 1984-02-09 ANT Nachrichtentechnik GmbH, 7150 Backnang Schaltregler mit einem pi- und einem d-regler in der regelschleife

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587506A (en) * 1983-12-22 1986-05-06 N.V. Nederlandsche Apparatenfabriek Nedap Safety transformer
EP0203444A1 (de) * 1985-05-23 1986-12-03 Siemens Aktiengesellschaft Primärgetaktetes Schaltnetzteil
EP0387961A1 (de) * 1989-03-14 1990-09-19 N.V. Nederlandsche Apparatenfabriek NEDAP Gleichspannungs-Wechselspannungs-Umformer mit galvanisch getrennten Eingangs- und Ausgangsschaltungen
US5019955A (en) * 1989-03-14 1991-05-28 N.V. Nederlandsche Appartenfabriek Nedap DC-to-AC voltage converter having galvanically separate input and output circuits
EP0460411A1 (de) * 1990-06-06 1991-12-11 International Business Machines Corporation Einrichtung und Verfahren zur Verbesserung der Steuerung von Schaltnetzteilen
EP0474312A1 (de) * 1990-09-06 1992-03-11 N.V. Nederlandsche Apparatenfabriek NEDAP Gleichstromwandler

Also Published As

Publication number Publication date
JPS5963985A (ja) 1984-04-11
EP0105541A3 (en) 1986-02-05
CA1199062A (en) 1986-01-07
JPH0527346B2 (de) 1993-04-20
ATE41083T1 (de) 1989-03-15
US4566060A (en) 1986-01-21
DE3379310D1 (en) 1989-04-06
EP0105541B1 (de) 1989-03-01

Similar Documents

Publication Publication Date Title
US4566060A (en) DC-to-AC Voltage converter having galvanically separated input and output(s)
KR100420608B1 (ko) 저가형고전압플라이백전원장치
US4754385A (en) Two transistor flyback switching converter with current sensing for discontinuous operation
US4887199A (en) Start circuit for generation of pulse width modulated switching pulses for switch mode power supplies
US5019955A (en) DC-to-AC voltage converter having galvanically separate input and output circuits
US6807075B2 (en) Start-up circuit for switched mode power supply
US6493245B1 (en) Inrush current control for AC to DC converters
US4642746A (en) Circuit arrangement for feeding the regulation and control device of a regulated direct voltage converter
EP0075947A2 (de) Schalt-stromversorgungsgerät
USRE34462E (en) Start circuit for generation of pulse width modulated switching pulses for switch mode power supplies
US4277824A (en) Start-up circuit
US6256179B1 (en) Switching power supply apparatus
US5406469A (en) Electronic switching power supply
EP0223293B1 (de) Stromversorgungsschaltung
EP0030829B1 (de) Sperrwandler
US4864480A (en) Process for operating a switching controller and switching controller functioning according to this process
US6608769B2 (en) Switched mode power supply with a device for limiting the output voltage
US5671129A (en) Electronic switched-mode power supply for supplying power to an accumulator
US5933333A (en) Switching power supply apparatus
EP0247407A2 (de) Leistungsversorgung der Schaltungsart
JPH08116671A (ja) スイッチング電源装置
SU1439715A1 (ru) Импульсный блок питани
JPH0624439B2 (ja) スイツチングレギユレ−タ
SU1265747A1 (ru) Стабилизатор напр жени с защитой
RU2035117C1 (ru) Однотактный преобразователь постоянного напряжения

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI NL SE

17P Request for examination filed

Effective date: 19860117

17Q First examination report despatched

Effective date: 19861028

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 19890301

REF Corresponds to:

Ref document number: 41083

Country of ref document: AT

Date of ref document: 19890315

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3379310

Country of ref document: DE

Date of ref document: 19890406

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19940823

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19940906

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19940913

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19940928

Year of fee payment: 12

Ref country code: AT

Payment date: 19940928

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19940930

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19941017

Year of fee payment: 12

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19941227

Year of fee payment: 12

EAL Se: european patent in force in sweden

Ref document number: 83201258.7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19950901

Ref country code: AT

Effective date: 19950901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19950902

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19950930

Ref country code: CH

Effective date: 19950930

Ref country code: BE

Effective date: 19950930

BERE Be: lapsed

Owner name: NEDERLANDSCHE APPARATENFABRIEK NEDAP N.V.

Effective date: 19950930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19960401

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19950901

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19960531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19960601

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 19960401

EUG Se: european patent has lapsed

Ref document number: 83201258.7

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST